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Lookup NU author(s): Professor Takeshi Nakagawa
This work is licensed under a Creative Commons Attribution 4.0 International License (CC BY 4.0).
The B-Tm tephra, dispersed during the highly explosive Changbaishan 'Millennium' eruption (ca. 940 -950 CE) and a key marker layer within the Greenland ice cores, has now been identified in the Lake Suigetsu (SG06) sedimentary sequence, central Japan. The major element geochemistry of the volcanic glasses within this tephra layer are compared to a new glass dataset from the distal type-locality (Tomakomai Port, Hokkaido) and other published 'Millennium' eruption/B-Tm deposits, to verify this correlation. The discovery of the B-Tm tephra in the Lake Suigetsu record provides, to date, the most southerly identification of this ash and, crucially, the first direct tie-point between this high-resolution, mid-latitude palaeoclimate archive and the Greenland ice cores. These findings present significant encouragement for on-going research into the tephrostratigraphy of East Asia, focusing on the identification of widely-dispersed tephra layers which can facilitate the synchronisation of disparate palaeoclimate archives and thus enable the assessment of spatio-temporal variations in past climatic change. (C) 2016 The Authors. Published by Elsevier Ltd.
Author(s): McLean D, Albert PG, Nakagawa T, Staff RA, Suzuki T, Suigetsu 2006 Project Members, Smith VC
Publication type: Article
Publication status: Published
Journal: Quaternary Science Reviews
Print publication date: 15/10/2016
Online publication date: 25/08/2016
Acceptance date: 16/08/2016
Date deposited: 24/03/2017
ISSN (print): 0277-3791
ISSN (electronic): 1873-457X
Publisher: Pergamon Press
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